Another advantage (for Embark) is their main engine codebase is also in Rust. This allows for sharing of some code on GPU and CPU. This isn't uncommon in the

Another advantage (for Embark) is their main engine codebase is also in Rust. This allows for sharing of some code on GPU and CPU. This isn't uncommon in the game industry, for example header files that compile in both C++ and HLSL in order to share struct definitions for CPU code and GPU code, and CPU math libraries that use HLSL types and semantics. Rust is different enough from GLSL and HLSL (most game engines use HLSL as "native" and cross compile to GLSL, MSL or use header defines to build PSSL) that introducing a new shading language compatible with Rust is probably worth the effort for them.